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package render_ir
import "core:mem"
Planned_Command :: struct {
handle: Command_Handle,
record: Command_Record,
target: Target_Handle,
layer: Layer_Handle,
layer_sort_base: i32,
order: Order_Mode,
sort_key: u64,
sequence: u64,
material: Material_Handle,
culled: bool,
cull_reason: Cull_Reason,
}
Cull_Reason :: enum {
None,
Target_Bounds,
Clip_Bounds,
}
command_plan_destroy :: proc(plan: ^[dynamic]Planned_Command) {
delete(plan^)
plan^ = nil
}
planned_from_draw :: proc(frame: ^Frame_IR, handle: Command_Handle, record: Command_Record, draw: ^Draw_Command) -> Planned_Command {
sequence := u64(handle)
packet := draw.packet
if packet.sequence != 0 {
sequence = packet.sequence
}
layer_sort_base: i32
if layer, ok := get_layer(frame, packet.layer); ok {
layer_sort_base = layer.sort_base
}
reason := Cull_Reason.None
return {
handle = handle,
record = record,
target = packet.target,
layer = packet.layer,
layer_sort_base = layer_sort_base,
order = packet.order,
sort_key = packet.sort_key,
sequence = sequence,
material = packet.material,
culled = packet_is_culled(frame, packet, &reason),
cull_reason = reason,
}
}
bounds_valid :: proc(bounds: Bounds3) -> bool {
return bounds.max.x > bounds.min.x && bounds.max.y > bounds.min.y
}
bounds_outside_rect :: proc(bounds: Bounds3, x, y, width, height: f32) -> bool {
if !bounds_valid(bounds) {
return false
}
return bounds.max.x < x || bounds.max.y < y || bounds.min.x > x + width || bounds.min.y > y + height
}
packet_effective_scissor :: proc(frame: ^Frame_IR, packet: Draw_Packet) -> (Scissor_Desc, bool) {
if packet.clip != INVALID_CLIP {
clip, ok := get_clip(frame, packet.clip)
if !ok || clip.kind != .Rect {
// Mask clips need planned stencil pass materialization before they can produce a scissor.
return {}, false
}
return clip.rect, true
}
target, ok := get_target(frame, packet.target)
if !ok || target.width == 0 || target.height == 0 {
return {}, false
}
return {x = 0, y = 0, width = target.width, height = target.height}, true
}
packet_is_culled :: proc(frame: ^Frame_IR, packet: Draw_Packet, reason: ^Cull_Reason = nil) -> bool {
if .Allow_Cull not_in packet.flags || !bounds_valid(packet.bounds) {
return false
}
target, target_ok := get_target(frame, packet.target)
if target_ok && target.width > 0 && target.height > 0 {
if bounds_outside_rect(packet.bounds, 0, 0, f32(target.width), f32(target.height)) {
if reason != nil {
reason^ = .Target_Bounds
}
return true
}
}
if packet.clip != INVALID_CLIP {
clip, clip_ok := get_clip(frame, packet.clip)
if clip_ok && clip.kind == .Rect {
rect := clip.rect
if bounds_outside_rect(packet.bounds, f32(rect.x), f32(rect.y), f32(rect.width), f32(rect.height)) {
if reason != nil {
reason^ = .Clip_Bounds
}
return true
}
}
}
return false
}
planned_from_dispatch :: proc(frame: ^Frame_IR, handle: Command_Handle, record: Command_Record, dispatch: ^Dispatch_Command) -> Planned_Command {
sequence := u64(handle)
if dispatch.sequence != 0 {
sequence = dispatch.sequence
}
layer_sort_base: i32
if layer, ok := get_layer(frame, dispatch.layer); ok {
layer_sort_base = layer.sort_base
}
return {
handle = handle,
record = record,
target = dispatch.target,
layer = dispatch.layer,
layer_sort_base = layer_sort_base,
order = .Strict,
sort_key = dispatch.sort_key,
sequence = sequence,
}
}
planned_from_legacy :: proc(handle: Command_Handle, record: Command_Record) -> Planned_Command {
return {
handle = handle,
record = record,
order = .Strict,
sequence = u64(handle),
}
}
planned_command_less :: proc(a, b: Planned_Command) -> bool {
if a.order == .Strict || b.order == .Strict || a.order == .Layered || b.order == .Layered {
return a.sequence < b.sequence
}
if a.target != b.target {
return a.target < b.target
}
if a.layer_sort_base != b.layer_sort_base {
return a.layer_sort_base < b.layer_sort_base
}
if a.layer != b.layer {
return a.layer < b.layer
}
if a.order != b.order {
return a.order < b.order
}
if a.sort_key != b.sort_key {
return a.sort_key < b.sort_key
}
if a.material != b.material {
return a.material < b.material
}
return a.sequence < b.sequence
}
plan_insert_stable :: proc(plan: ^[dynamic]Planned_Command, command: Planned_Command) {
insert_at := len(plan^)
for i in 0..<len(plan^) {
if planned_command_less(command, plan^[i]) {
insert_at = i
break
}
}
append_elem := command
append(plan, append_elem)
for i := len(plan^) - 1; i > insert_at; i -= 1 {
plan^[i] = plan^[i - 1]
}
plan^[insert_at] = command
}
plan_flush_segment :: proc(plan: ^[dynamic]Planned_Command, segment: ^[dynamic]Planned_Command) {
for command in segment^ {
append(plan, command)
}
clear(segment)
}
plan_frame_commands :: proc(frame: ^Frame_IR, allocator: mem.Allocator = context.allocator) -> [dynamic]Planned_Command {
plan := make([dynamic]Planned_Command, 0, len(frame.commands), allocator)
segment := make([dynamic]Planned_Command, 0, len(frame.commands), allocator)
defer delete(segment)
for record, i in frame.commands {
handle := Command_Handle(i + 1)
command := planned_from_legacy(handle, record)
switch record.kind {
case .Draw:
draw, ok := get_draw(frame, handle)
if ok && draw_kind_is_packet(draw.kind) {
command = planned_from_draw(frame, handle, record, draw)
}
case .Dispatch:
dispatch, ok := get_dispatch(frame, handle)
if ok {
command = planned_from_dispatch(frame, handle, record, dispatch)
}
}
if command.order == .Strict || command.order == .Layered {
plan_flush_segment(&plan, &segment)
append(&plan, command)
} else {
plan_insert_stable(&segment, command)
}
}
plan_flush_segment(&plan, &segment)
return plan
}